Having demo classes willingly, Participating in some study groups voluntarily, Writing many theses on your own accord. These are common ways to improve your profession for every remarkable teacher.
I said If you want your skills to improve, you must through situations such as go through in a tense situation and accepting a strict instruction from supervisors who are better than you. But aside from these things, we have the other important options.
I'd like to show "6.ways of training to get a Black Belt" that was mentioned by Mr.Yoichi Mukoyama.
_1. Learning 100 of excellent ways and techniques.
_2. Tracing 100 of excellent class lesson plans.
_3. Doing 100 demo classes.
_4. Attending study meetings 100 times.
_5. Writing 100 of class lesson plans.
_6. paying out of your own pocket for learning.
Teachers who have been through these things would be really strong-willed, and never give up.